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Transcript of Is making the link COMSOFT COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 1 AMHS...
is making the linkCOMSOFT
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 1
AMHS InteroperabilityAMHS Interoperability
AMHS Implementation WorkshopAMHS Implementation Workshop
Chennai, IndiaChennai, India
15–16 15–16 December December 20082008
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 2
OverviewOverview
Mixed environmentMixed environment
ATN protocol variantsATN protocol variants
AMHS interoperabilityAMHS interoperability
Impact and limitationsImpact and limitations
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 3
Mixed EnvironmentMixed Environment
Transition periodTransition period
AFTNAFTN
AMHSAMHS• ATN/OSI
• ATN/IPS
AFTN AMHS
AFTN AFTN+
AMHS AMHS
AMHSAMHS
AFTN+
AMHS
ATN/OSI
ATN/ISP
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 4
End User ConnectivityEnd User Connectivity
AFTN to AFTN AFTN to AFTN
AFTN to AMHS and vice versaAFTN to AMHS and vice versa
AMHS to AMHSAMHS to AMHS
AFTN
AFTN
AMHS
AMHS AMHS AMHSAMHS
AMHSAMHS
AMHSAMHS
AFTN
AFTNAFTN
AFTNAFTN
AFTNAFTN
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 5
AMHS over ATN/OSI AMHS over ATN/OSI • Initial approach as per ICAO Doc 9705
• Adopted early by ASIA/PAC Regions
AMHS over ATN/IPSAMHS over ATN/IPS• Introduced to use widespread IP technology
• Optional in ASIA/PAC Regions
ATN Protocol VariantsATN Protocol Variants
??AMHSover
ATN/OSI
AMHSover
ATN/IPS
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 6
AMHS Protocol StackAMHS Protocol Stack
AMHS ApplicationAMHS Application• based on OSI 7 layers
AMHS upper layersAMHS upper layers• Layers 5 - 7
• Uniform
• Independent of networks
AMHS lower layersAMHS lower layers• Layers 1 - 4
• ATN/OSI or ATN/IPS
Application
Application Layer
Presentation Layer
Session Layer
7
6
5
4
3
Transport Layer
Network Layer
Data Link Layer2
Physical Layer1
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 7
AMHS over ATN/OSIAMHS over ATN/OSI
Transport Protocol Class 4Transport Protocol Class 4
Connectionless Network ProtocolConnectionless Network Protocol
Various sub-networksVarious sub-networks• LAN: LLC1, ...
• WAN: X.25, ...
ATN RouterATN Router• Unique to aviation due to extensions
• Designed to support G/G and A/G
• Open for integration of other sub-networks
4
3
Transport LayerTransport Protocol Class 4 (TP4)
2
LLC1
Network LayerConnectionless Network Protocol (CLNP)
X.25......
CSMA/CD LAPB...
LAN WAN
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 8
AMHS over ATN/OSIAMHS over ATN/OSI
Example for a pure ATN/OSI environmentExample for a pure ATN/OSI environment
AMHS Applications operate over LAN (e.g. TP4 / CLNP / LLC1)AMHS Applications operate over LAN (e.g. TP4 / CLNP / LLC1)
ATN Router interconnect using WAN (e.g. CLNP over X.25)ATN Router interconnect using WAN (e.g. CLNP over X.25)
ATN Router
CLNP
Session
Pres.
Appl.
Session
Pres.
Appl.
...
ATS MessageServer
TP4
ATS MessageServer
CLNP
...
TP4
ATN Router
AMHSATN/OSI
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 9
AMHS over ATN/IPSAMHS over ATN/IPS
Transport Protocol Class 0Transport Protocol Class 0
Transmission Control ProtocolTransmission Control Protocol
Internet ProtocolInternet Protocol• IPv4 (RFC 1006)
• IPv6 (RFC 2126)
Standard IP RouterStandard IP Router• Interoperability IPv4/v6 by
Network Address Translation andProtocol Translation (NAT/PT)
4
3
Transport LayerTransport Protocol Class 0 (TP0)
RFC 1006 / RFC 2126
2
Transmission ControlProtocol (TCP)
Internet Protocol (IP)
LAN
CSMA/CD
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 10
AMHS over ATN/IPSAMHS over ATN/IPS
Example for a pure ATN/IPS environmentExample for a pure ATN/IPS environment
AMHS Applications operate over LAN (e.g. TCP/IP / Ethernet)AMHS Applications operate over LAN (e.g. TCP/IP / Ethernet)
IP Router interconnect using WAN (e.g. TCP/IP over Frame Relay)IP Router interconnect using WAN (e.g. TCP/IP over Frame Relay)
IP Router
TCP/IP
Session
Pres.
Appl.
Session
Pres.
Appl.
...
ATS MessageServer
TP0
ATS MessageServer
TCP/IP
...
TP0
IP Router
AMHSATN/IPS
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 11
Coexistance of ATN/OSI and ATN/IPSCoexistance of ATN/OSI and ATN/IPS
How to connect ?How to connect ?
Common Protocol Stack requiredCommon Protocol Stack required
Protocol stacks are not compatible!Protocol stacks are not compatible!
ATN Router
CLNP
Session
Pres.
Appl.
Session
Pres.
Appl.
...
ATS Message Server
TP4
ATS Message Server
TCP/IP
...
TP0
IP Router
?AMHS
ATN/OSIAMHS
ATN/IPS
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 12
AMHS using Dual Stack RouterAMHS using Dual Stack Router
Example for a dual stack routerExample for a dual stack router
AMHS End Systems operate over LANAMHS End Systems operate over LAN
ATN Router implements both stacks and a ATN Router implements both stacks and a Transport BridgeTransport Bridge
Dual Stack Router
Session
Pres.
Appl.ATS Message
ServerATS Message
Server
TCP/IP
...
TP0
IP Router
CLNP
Session
Presentation
Application
...
TP0
TCP/IP
...
AMHSATN/OSI
AMHSATN/IPS
TP4
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 13
AMHS using Dual Stack ApplicationAMHS using Dual Stack Application
Example for a dual stack ATS Message ServerExample for a dual stack ATS Message Server
AMHS Application implements both stacks AMHS Application implements both stacks ATN Router interconnects using ATN/OSIATN Router interconnects using ATN/OSI IP Router interconnects using ATN/IPSIP Router interconnects using ATN/IPS
ATNRouter
Session
Pres.
Appl.ATS Message
ServerATS Message
Server
TCP/IP
...
TP0
IP Router
CLNP
Session
Presentation
Application
...
TP0
TCP/IP
...
AMHSATN/OSI
AMHSATN/IPS
TP4
IP Router
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 14
AFTN/AMHS GatewayAFTN/AMHS Gateway
Interconnects AMHS with AFTNInterconnects AMHS with AFTN• Seamless transition from AFTN to AMHS
• AFTN – AFTN over AMHS
Bi-directional message exchangeBi-directional message exchange• ATS Messages
• Conversion of addresses and contents
• Limitations from AMHS to AFTN
Transparent to end usersTransparent to end users
End users can migrate any timeEnd users can migrate any time
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 15
AFTN/AMHS GatewayAFTN/AMHS Gateway
AFTN – AMHSAFTN – AMHS• AFTN/AMHS Gateway on AFTN side
AFTN – AFTNAFTN – AFTN• AFTN/AMHS Gateway
on both sides
AFTN
AFTN
AFTN/AMHSGateway
AMHS
AMHSAMHS
AFTN/AMHSGateway
ATS MessageServer
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 16
Interoperability TestsInteroperability Tests
Ensure interoperability of products from different suppliersEnsure interoperability of products from different suppliers
ASIA/PAC AMHS ManualASIA/PAC AMHS Manual• Conformance (Annex B)
• Interoperability (Annex E)
• Per-Operational (Annex F)
ATN Routers and AMHS Applications are interoperableATN Routers and AMHS Applications are interoperable• Trials
• Interoperability tests
• Daily operation
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 17
Plans for ASIA/PAC RegionsPlans for ASIA/PAC Regions
Strategy for ATN/IPS in ASIA/PAC is under considerationStrategy for ATN/IPS in ASIA/PAC is under consideration
Backbone systems implement dual stack solutionsBackbone systems implement dual stack solutions• ATN/OSI
• ATN/IPS
Non-backbone system mayNon-backbone system mayimplement ATN/OSI or ATN/IPSimplement ATN/OSI or ATN/IPS
Long-term objective: ATN/IPSLong-term objective: ATN/IPS
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 18
SummarySummary
Coexistance of ATN/OSI and ATN/IPSCoexistance of ATN/OSI and ATN/IPS• Dual stack routers or applications
Integration of AFTN usersIntegration of AFTN users• AFTN/AMHS Gateway
Transparency for end usersTransparency for end users• AFTN
• AMHS
Interoperability TestsInteroperability Tests• ASIA/PAC: AMHS Manual
• EUR: ECG initiative and AMHS Manual
COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 19
Thank you !Thank you !
[email protected]@COMSOFT.aero